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Date: Mon, 16 Jul 2007 06:50:00 -0000
Subject: [Bug rtl-optimization/32773]  New: [4.3 Regression] SH: ICE in create_pre_exit, at mode-switching.c:223
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With -m4 -O -fprofile-use, sh-elf compiler fails for

void foo (int *p)
{
  if (p)
    *p = 0;
}

with

  internal compiler error: in create_pre_exit, at mode-switching.c:223

It starts to fail after the patch

r126576 | rakdver | 2007-07-12 19:24:19 +0900 (Thu, 12 Jul 2007) | 5 lines

        PR rtl-optimization/32729
        * cfghooks.c (can_duplicate_block_p): Do not forbid duplicating blocks
        that fallthru to exit.

mode-switching.c:create_pre_exit seems to assume that there is
at most one fallthru predecessor to exit block.  Unfortunately,
cfg_layout_finalize can't fix the problem, as mode-switching pass
runs before reload_completed and cfg_layout_finalize calls
fixup_fallthru_exit_predecessor only after reload_completed.


-- 
           Summary: [4.3 Regression] SH: ICE in create_pre_exit, at mode-
                    switching.c:223
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kkojima at gcc dot gnu dot org
GCC target triplet: sh-elf


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32773